Fuel Spray Formation & Wall Impingement in Engines

该项目将研究直接喷射火花点火（DISI）发动机燃油喷雾发展的基本原理。关键研究领域将包括全口径燃油喷雾形成和光学发动机的壁撞击成像，以及与气体和颗粒废气排放的相关性。喷雾形成和撞击试验也将在受控热力学条件下的定容燃油喷射室中进行。还将研究碰撞位置的壁面传热。这些研究方法的结合将全面了解与各种发动机运行模式和喷射策略相关的缸内效应。还将探讨减少燃料壁撞击影响的表面处理。

This project will investigate the fundamentals of fuel spray development in Direct-Injection Spark-Ignition (DISI) engines. Key areas of study will include full-bore fuel spray formation and wall impingement imaging in an optical engine and correlation with gaseous and particulate exhaust emissions. Spray formation and impingement tests will also be conducted in a constant volume fuel injection chamber at controlled thermodynamic conditions. Wall heat transfer at locations of impingement will also be studied. The combination of these research methods will give a full picture of in-cylinder effects related to various engine operating regimes and injection strategies. Surface treatments to reduce the effects of fuel wall impingement will also be explored.